Methodology for quantifying perceptual effects from noise suppression systems.
Methodology is proposed for perceptual assessment of both subjective sound quality and speech recognition in such way that results can be compared between these two aspects. Validation is performed with a noise suppression system applied to hearing instruments. A method termed Interpolated Paired Co...
| Publicado en: | International Journal of Audiology Vol. 44; no. 12; pp. 721 - 733 |
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| Autores principales: | , , , |
| Formato: | equations & formulas research tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
Dec2005
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=106424526&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 106424526 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 14992027 JW2 jtl: International Journal of Audiology issn: 14992027 maglogo: Y pubinfo: dt: Dec2005 vid: 44 iid: 12 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 106424526 106424526 2009114774 10.1080/14992020500271712 NLM16450924 106424526 ppf: 721 ppct: 12 formats: fmt: @attributes: type: P tig: atl: Methodology for quantifying perceptual effects from noise suppression systems. aug: au: Dahlquist M Lutman M Wood S Leijon A affil: KTH, S3 - Sound and Image Processing, Stockholm, Sweden sug: subj: Auditory Perception Hearing Aids Noise Prevention and Control Adult Aged Aged, 80 and Over Algorithms Descriptive Statistics England Equipment Design Female Funding Source Male Middle Age Sensitivity and Specificity Sound Evaluation Speech Discrimination Tests Speech Perception Sweden Test-Retest Reliability Visual Analog Scaling Wilcoxon Signed Rank Test Human Adult: 19-44 years Aged: 65+ years Aged, 80 & over Middle Aged: 45-64 years Female Male ab: Methodology is proposed for perceptual assessment of both subjective sound quality and speech recognition in such way that results can be compared between these two aspects. Validation is performed with a noise suppression system applied to hearing instruments. A method termed Interpolated Paired Comparison Rating (IPCR) was developed for time efficient assessment of subjective impression of different aspects of sound quality for a variety of noise conditions. The method is based on paired comparisons between processed and unprocessed stimuli, and the results are expressed as the difference in signal-to-noise ratio (dB) between these that give equal subjective impression. For tests of speech recognition in noise, validated adaptive test methods can be used that give results in terms of speech-to-noise ratio. The methodology was shown to be sensitive enough to detect significant mean differences between processed and unprocessed speech in noise, both regarding subjective sound quality and speech recognition ability in groups consisting of 30 subjects. An effect on sound quality from the noise suppression equivalent to about 3-4 dB is required to be statistically significant for a single subject. A corresponding effect of 3-6 dB is required for speech recognition (one-sided test). The magnitude of difference that occurred in the present study for sound quality was sufficient to show significant differences for sound quality within individuals, but this was not the case for speech recognition. pubtype: Academic Journal doctype: equations & formulas research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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